The most romantic novel of the summer - a book that has been praised by Nicholas Sparks as "unforgettable." Heather meets Jack on an overnight train, an adventurer who changes the course of her journey and her life. Throwing her careful itinerary to the wind, they follow Jack's grandfather's journal through post-World War II era Europe. But Jack has a secret that could change everything, and Heather's world is about to be shaken to the core.